.. _vars:

********************
Transcript Variables
********************

Below are descriptions of some of the key variables we collect on our subjects 
and their parents based on the sample of spontaneous speech taken at each 
session/visit.

Speech
======

At each session/visit, we collect the following speech variables.

Utterances
----------

MLU
---

The mean length of utterance.

Word Tokens
-----------

Word Types
----------

New Word Types
--------------

Cumulative Word Types
---------------------